Yōga Sūtra 1.24

क्लेशकर्मविपाकाशयैरपरामृष्टः पुरुषविशेष ईश्वरः।

Being untouched by obstacles, fruits of activities, and desires is the specialty of the being called īśvaraḥ.

The definition of īśvaraḥ is given here. He is a special being who is not touched by the obstacles, fruits of activities and desires.